<template>
  <div class="list" ref="wrapper">
      <div>
            <div class="area">
            <div class="title border-topbottom">当前城市</div>
            <div class="button-list">
                <div class="button-wrapper">
                    <div class="button">{{this.city}}</div>
                </div>
            </div>
            </div>
            <div class="area">
                <div class="title border-topbottom">热门城市</div>
                <div class="button-list">
                    <div class="button-wrapper"
                      v-for="item of hotCities"
                      :key="item.id"
                      @click="handleCityClick(item.name)"
                      >
                        <div class="button">{{item.name}}</div>
                    </div>
                </div>
            </div>
            <div class="area"
                v-for="(itemCities,key) of cities"
                :key="key"
                :ref="key"
            >
                <div class="title border-topbottom">{{key}}</div>
                <div class="item-list"
                     v-for="item of itemCities"
                     :key="item.id"
                     @click="handleCityClick(item.name)"
                >
                    <div class="item border-bottom">{{item.name}}</div>
                </div>
            </div>
      </div>
  </div>
</template>

<script>
import BScroll from 'better-scroll'
import { mapState, mapMutations } from 'vuex'
export default {
  name: 'CityList',
  props: {
    cities: Object,
    hotCities: Array,
    letter: String
  },
  computed: {
    ...mapState(['city'])
  },
  methods: {
    handleCityClick (city) {
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['changeCity'])
  },
  watch: {
    letter () {
      if (this.letter) {
        const element = this.$refs[this.letter][0]
        this.scroll.scrollToElement(element)
      }
    }
  },
  mounted () {
    this.scroll = new BScroll(this.$refs.wrapper, {
      click: true
    })
  }
}
</script>

<style lang="stylus" scoped>
    @import '~styles/varibles.styl'
    .border-topbottom
        &:before
            border-color #CCC
        &:after
            border-color #CCC
    .border-bottom
        &:before
            border-color #CCC
    .list
        overflow hidden
        position absolute
        top 1.58rem
        left 0
        right 0
        bottom 0
        .title
            line-height .54rem
            background #eee
            padding-left .2rem
            color #666
            font-size .26rem
        .button-list
            overflow hidden
            padding .1rem .6rem .1rem .1rem
            .button-wrapper
                float left
                width 33.33%
                .button
                    margin .1rem
                    padding .1rem
                    text-align center
                    border .02rem #ccc solid
                    border-radius .06rem
        .item-list
            .item
                line-height .76rem
                padding-left .2rem
</style>
